/*
* Copyright (c) Microsoft Corporation. All rights reserved.
* Copyright (c) 2023 Huawei Device Co., Ltd.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*     http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* This file has been modified by Huawei to verify type inference by adding verification statements.
*/

// === tests/cases/compiler/typePredicateWithThisParameter.ts ===
declare function AssertType(value:any, type:string):void;
// Repro from #15310

interface Foo {
    foo: string;
}
interface Bar {
    bar: string;
}

function isFoo1(object: {}): object is Foo {
AssertType('foo' in object, "boolean");
AssertType('foo', "string");
AssertType(object, "{}");
    return 'foo' in object;
}

function isFoo2(this: void, object: {}): object is Foo {
AssertType('foo' in object, "boolean");
AssertType('foo', "string");
AssertType(object, "{}");
    return 'foo' in object;
}

declare let test: Foo | Bar;
AssertType(test, "union");

if (isFoo1(test)) {
    test.foo = 'hi';
AssertType(test.foo = 'hi', "string");
AssertType(test.foo, "string");
AssertType('hi', "string");
}

if (isFoo2(test)) {
    test.foo = 'hi';
AssertType(test.foo = 'hi', "string");
AssertType(test.foo, "string");
AssertType('hi', "string");
}


